The causes of pain in the center of the left foot plate are as follows: First, plantar tendonitis: the plantar tendon membrane starts from the front of the heel bone and ends at the base of the toe bone. If you often walk with weight, such as mountaineering, hiking, walking up and down the stairs or carrying heavy school bags, it will lead to an increase in the load on the plantar tendon membrane, and thus plantar tendonitis will occur, and the center of the foot will experience pain. Second, patients with flatfoot syndrome: in flatfoot syndrome, the foot arch will collapse, the ability of the foot arch to absorb shock and cushion shock disappears, so the plantar tendon membrane will be subjected to a greater load. Generally, plantar tendonitis occurs under normal physiological activities, which is also manifested as pain in the center of the sole of the foot.